Valve mechanism for train-stopping apparatus



.March 25 i 1924.

J. F. WEBB, JR VALVE MECHANISM FOR TRAIN STOPPING APPARATUS Filed Dec.

30 1922 2 Sheets-Sheet 1 Jean EWe, Jr

BY ATTORNEYS Patented Mar. 25, 192 1.

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- NETE PTET Fldli.

JEAN FRANCIS WEBB, TIL, OF NEW YORK, N. .15., ASSIGNOR TO THE INTERNATIONAL SIGNAL 00., A CORPORATION OF ARIZONA.

VALVE MECHANISEI FOR TRAIN-STOPPING APPARATUS.

Application filed December 30, 1922. Serial No. 609,865.

T all whom it may concern:

Be it known that I, JEAN F. WEBB, JR,

a citizen of the United States, residing at New York, in the county of New York and 5 State of New York, have invented certain new and useful Improvements in Valve Mechanism for Train-Stopping Apparatus,

of which the following is a specification.

This invention relates to certain new and useful improvements in the valve mechanism for train stopping apparatus of the type employing mechanically operated electrically controlled devices for moving the valve mechanism to elfect a brake applying action. The present invention primarily has for its object to provide an improved construction of valve mechanism of the general type disclosed in my Patent No. 1,284,509 issued November 12, 1918. The present invention has for its object to simplify and make more rugged the construction of the parts, to eliminate expense as far as possible, to efiect the movements of the valves by positive cam action in both directions and to so design and arrange the parts that they may be assembled or taken apart and reassembled in a convenient and foolproof manner.

Again, it is an object of the invention to provide means whereby should the valve housing become unbolted or loosened from the support to which it is attached air will escape which will reduce train line pressure sufficient to operate the brakes.

In the present invention also I have provided means for straining the air passing through the valve chambers from the engineers side to the train line side.

With other objects in view which will hereinafter become apparent, the-invention also includes those novel features of const-ruotion, combination and arrangement of parts, all of which will be first fully described, then be specifically pointed out in .the appended claims, and illustrated in the accompanying drawings, in which Figure 1 is a rear elevation of the valve mechanism.

Figure 2 is a vertical section on the line 2-2 of Figure 1.

Figure 3 is a vertical central longitudinal section of the valve casing or housing.

Figure 4 is a longitudinal section on the line 4:4: of Figure 2.

Figure 5 is a detail elevation of the outlet valve cage and valve unit.

Figure 6 is a detail plan view of the springy union member between the valve stem and the guide stem of the horizontal valve.

Figure 7 is an inside elevation of the cover for the main chamber of the valve casing showing the pin retaining bosses.

In the accompanying drawings, in which like numerals and letters of reference indicate like parts in all of the figures, 88 is the valve housing which has a central chamber 89, a cam shaft bearing 90, a front cover 91 with a central chamber 92 and pin retaining bosses, a horizontal outlet valve housing 94, a vertical inlet valve housing 116, a vertical strainer cylinder 131, a horizontal strainer cylinder 137 and an outlet port 113.

The housing 94 has a flange 95 against which the curved edge 98 of the removable partition cylinder 96 is pressed with air tight contact by the screws which fasten the cap 100 in place.

97 is a valve seat for the small poppet valve 105 which has a squared stem portion 102 to lie between the anti-rotation lug 101 of the cover plate 100.

The cylinder 96 has guide ribs 103 which project beyond the edge 98 of the cylinder. There are four guide ribs. One pair of diagrammatically opposite spaces between the ribs 103 is wider than the other so as to receive the locking lug 104 on the casing 88 and insure register of one air port 112 with the outlet port 113 in assembling the parts.

The small poppet valve 105 has guide ribs 106 on its stem and has a threaded portion 110 to screw into the threaded socket of a valve stem and yoke connecting spring 111.

107 is the roller yoke for the valve 105. It has guide ribs 108 to cooperate with the ribs 103 and a threaded portion 109 to screw into the other socket of the spring 111.

A cam engaging roller 114 is carried on a pin 115 in the yoke 107 and operates in the slot 128 of the cam 127.

The vertical inlet valve casing 116 has an air chamber separated from the central chamber 89 by a cylindrical partition and web 117 which has a valve seat 118.

A cover plate 119 is fitted air tight on the casing 116.

120 designates the large poppet valve whose stem has a portion 121 for retaining the anti-rattling spring 122. The roller yoke 124, which constitutes a part of the valve stem, has guide ribs 123 and carries a roller 125 011 a pin 126 to operate in the cam slot 129-130 of the cam 127.

The roller yokes 107 and 124 straddle the cam 127 and are thus held against axial rotation.

The slot 129130 is of a peculiar shape, the portion 130 is larger than the approximate diameter of the roller 126 so as to allow a limited free movement of the valve 120 when the roller is in the portion 130 of the groove to insure tight seating of the valve 102 under air and spring pressure and yet not interfere with the engineers emergency applica tion of the brakes.

The strainer cylinder 131 has a strainer 132 and communicates with the top chamber of the casing 116 by a duct 136. It is bored and tapped at its ends at 133 and holds a removable strainer. Into the upper tap the duct from the engineers valve is screwed while the other tap is plugged at 134.

135 represents hollow attaching lugs through which the cap screws 134 that fasten the housing 88 into the back wall 13 pass.

138 is a strainer in the cylinder 137 The cylinder is tapped at 139 and plugged at 140.

The duct which takes the air from the chamber 89 to the train line is screwed into the tap bore 139.

The valve housing 89 has a duct 141 that leads from the air chamber 142 to the air duct of the train stopping apparatus (not shown). The chamber 142 communicates with the chamber 89 by a passage 143. V

The normal positions of the respective parts are as shown in the drawings.

When the parts are in this normal position, the air enters the automatic stop air valve at the opening 133, passes through a strainer 132 into duct 136, out of duct 136 through the port controlled by the large poppet valve 120 and into chamber 89. It passes out of chamber 89 through a strainer 138 leaving the air valve at the opening 139 and continuing through the remainder of the brake pipe. The air from chamber 89 cannot pass to port 113 and the atmosphere because the port in partition 96 is closedby the small poppetvalve 105. The normal position of the-valve ports-thus permits the engineer to apply and release the brakes at will with his own valve.

When the operating plunger of the train Stopping apparatus (not shown) ascends the approach slope of a ramp it oscillates the movable unit composed of themain cam 74 and the valve cam 127 from the normal to the abnormal position. The outer camming face of the slot 129-130 pulls the lar e poppet 120 down to its seat 118 closing t e port between the air duct 136 and chamber 89 and the inner camming face of slot 128 pushes the small poppet valve 105 05 its seat opening the port between air qhamber 89 and port 113 and thus connecting air chamber 89 through air port 113 with the audible signal whistle and the atmosphere,

Ina proceed action, as the operating plunger (not shown) passes off the ramp, the valve cam 129-130 is oscillated, in the reverse direction back to the normal position, the outer camining face of slot 128 pulls the small poppe't'valve 105 down to its seat 97 reclosing the port between air ducts 136 and chamber 89 which stops the escape of brake pipe air to the atmosphere,'and the inner camming face of slot 129-4 30 pushes the large poppet valve 120 off of its seat 118 reopening the port between the air duct 136 and chamber 89, which re-estab lishes the normal flow of brake pipe air.

In a stop action, this reverse oscillation does not take place, and the valve parts remain in their respective abnormal positions.

lVhen the parts are in the abnormal position, the air from duct 136 cannot pass into chamber 89 because the large poppet valve 120 closes the port in partition 118but the air from the other portion of the air brake system reversing the direction of its normal flow, enters the air valve at opening 139, passes through a strainer 138 into chamber 89, goes through the now openport in par tition 86 into port 113, and thence escapes to the atmosphere through the whistle pipe and audible signal whistle'in the cab of the engine.

In a proceed action, this abnormal position is only momentary and the brake pipe air pressure is not reduced sufiiciently to start a braking action.

From the foregoing it will be seen that the parts of the mechanism are so designed that they can be readily assembled and disassembled by anyone not necessarily a skilled mechanic. By providing the locating lug 104 it will be found impossible to insert the body 96 in the cylinder 94 in a wrong position and by providing the blockading lug 99 it will be impossible to insert the valve yoke 108 and spring 111 in any way than a horizontal position for the spring. The object of thus fixing the spring in horizontal posi tion is to prevent dust or dirt accumulating in the loopsof the spring which might inter few with the action of the same.

From the foregoing, taken in connection with the, accompanying. drawings, it is thought the complete construction, operation and advantages of my invention Will be readily understood by those skilled in the art to which my invention relates.

What I claim is:

1. In a mechanism of the class described, a housing having two distinct valve chambers with valve openings, valves for con trolling said openings, an oscillatable double slotted cam disk, said valves including stemyokes engaging said disk and having rollers mounted in the cam slots for operating said valves on alternate oscillations of said cam.

2. In mechanism of the class described, a housing having a central chamber and a plurality of branch chambers, said housing having an inlet chamber and a duct therefrom to one of said branch chambers, a valve in said branch chamber to control the air passage from said duct to said central chamber, said housing having an outlet chamber communicating with said central chamber and having an outlet port from another of said branch chambers, a valve mechanism including a valve in said other branch chamber, an oscillatable cam disk, said valves having stem-yokes to receive said cam disk, said disk havin cam slots one for each valve, rollers locate in said slots and carried by said yokes for positively opening and closing said valves alternately as said cam is oscillated.

3. In mechanism of the class described, a housing having a central chamber and a plurality of branch chambers, said housing having an inlet chamber and a duct therefrom to one of said branch chambers, a valve in said branch chamber to control the air passage from said duct to said central chamber, said housing having an outlet chamber communicating With said central chamber and having an outlet port from another of said branch chambers, a valve mechanism including a valve in said other branch chamber, m oscillatable cam disk, said valves having stem-yokes to receive said cam disk, said disk having cam slots one, for each valve, rollers located in said slots and carried by said yokes for positively opening and closing said valves alternately as said cam is oscillated, another of said branch chambers having an outlet port.

4. In mechanism of the class described, a housing having a central chamber and a plurality of branch chambers, said housing having an inlet chamber and a duct therefrom to one of said branch chambers, a valve in said branch chamber to control the air passage from said duct to said central chamber, said housing having an outlet chamber communicating with said central chamber and having an outlet port from another of said branch chambers, a valve mechanism, including a valve, in said other branch chamber,

an oscillatable cam disk, said valves having stem-yokes to receive said cam disk, said disk having cam slots one for each valve, rollers located in said slots and carried by said yokes for positivel opening and closing said valves alternately as said cam is oscillated, and strainers in said inlet and outlet chambers.

5. In mechanism of the class described, a housing having a central chamber and a plurality of branch chambers, said housing having an inlet chamber and a duct therefrom to one of said branch chambers, a valve in said branch chamber to control the air passage from said duct to said central chamber, said housing having an outlet chamber communicating with said central chamber and having an outlet port from another of said branch chambers, a valve mechanism, including a valve, in said other branch chamber, an oscillatable cam disk, said valves having stem-yokes to receive said cam disk, said disk having cam slots one for each valve, rollers located in said slots and carried by said yokes for positively opening and closing said valves alternately as said cam is os cillated, said valve mechanism including a valve proper and a springy union member connecting the same to its yoke.

6. In mechanism of the class described, a housing having a central chamber and a plurality of branch chambers, said housing having an inlet chamber and a duct therefrom to one of said branch chambers, a valve in said branch chamber to control the air pas sage from said duct to said central chamber, said housing having an outlet chamber communicating With said central chamber and having an outlet port from another of said branch chambers, a valve mechanism, including a valve, in said other branch chamber, an oscillatable cam disk, said valves having stem-yokes to receive said cam disk, said disk having cam slots one for each valve, rollers located in said slots and carried by said yokes for positively opening and closing said valves alternately as said cam is oscillated, said valve mechanism comprising a removable partition member having guide ribs and a valve seat, a valve proper cooperating'with said seat, a valve-stemyoke with guide ribs operating in said partition member, and a springy connection between said valve proper and said yoke.

7. In mechanism of the class described, a housing having a central chamber and a plurality of branch chambers, said housing having an inlet chamber and a duct therefrom to one of said branch chambers. a valve in said branch chamber to control the air passage from said duct to said central chamber, said housing having an outlet chamber communicating with said central chamber and having an outl t port from another of said branch chambers. a valve mechanism, including a valve, in said other branch chamber, an oscillatable cam disk, said valves having stem-yokes to receive said cam disk, said disk having cam slots one for each valve, rollers located in said slots and carried by said yokes for positively opening and closing said valves alternately as said cam is oscillated, said valve mechanism comprising a removable partition member having guide ribs and a valve seat, a valve proper cooperating with said seat, a valve-stein-yoke with guide ribs operating in said partition member, a springy connection between said valve proper and said yoke, said valve mechanism being assembled as a unit and inserted in its branch chamber as such, and means to locate said unit properly while inserting the same.

8. In mechanism of the class described, a housing having a central chamber and a plurality of branch chambers, said housing having an inlet chamber and a duct therefrom to one of said branch chambers, a valve in said branch chamber to control the air passage from said duct to said central chamber, said housing having an outlet chamber communicating with said central chamber and having an outlet port from another of said branch chambers, a valve mechanism, including a valve, in said other branch chamber, an oscillatable cam disk, said valves having stem-yokes to receive said cam disk, said disk having cam slots one for each valve, rollers located in said slots and carried by said yokes for positively opening and closing said valves alternately as said cam is oscillated, said valve mechanism comprising a removable partition member having guide ribs and a valve seat, a valve proper cooperating with said seat, a valvestem-yoke with guide ribs operating .in said partition member, a springy connection between said valve proper and said yoke, said valve mechanism being assembled and inserted into its branch chamber as a unit, and means to eliect an air sealing contact between said partition member and the wallof the branch chamber.

9. In mechanism of the class described, a housing having a central chamber anda plurality of branch chambers, said housing hav .ing an inlet chamber and a duct therefrom to one of said branch chambers, a valve in said branch chamber to control the air passage from said duct to said central chamber, said housing having an outlet chamber communicating with said central chamber and having an outlet port from another of said branch chambers, a valve mechanism, including a valve, in said other branch chamber, anoscillatable cam disk, said valves having stem-yokes to receive said cam disk, said disk having cam slots one for each valve, rollers located in said slots and carried by said yokes for positively opening and closing said valves alternately as said cam isoscillated, said valve mechanism comprising a removable partition member having guide ribs and a valve seat, a valve proper cooperating with said seat, a valve-stem yoke with guide ribs operating in said partition member, a springy connection between said valve proper and said yoke, and means to effect an air sealing contact between said partition member and the chamber wall in which it is inserted.

10. In mechanism of the class described, a housing having a central chamber and a plurality of branch chambers, said housing having an inlet chamber and a duct therefrom to one of said branch chambers, a valve in said branch chamber to control the air pas sage from said duct to said central chamber, said housing having an outlet chamber communicating with said central chamber-and having an outlet port from another of said branch chambers, a valve mechanism, including a valve, in said other branch chamber, an oscillatable cam disk, said valves having stem-yokes to receive said cam disk, said disk having cam slots one for each valve, rollers located in said slots and carried by said yokes for positively opening and closing said valves alternately as said cam is oscillated, said valve mechanism comp-ris ing a removable partition member having guide ribsand a valve seat, a valve proper cooperating with said seat, a valve-stem-yoke with guide ribs operating in said partition member, a springy connection between said valve proper and said yoke, said Valve mechanism being assembled and inserted into its branch chamber as a unit, means to effect an air sealing contact between said partition member and the wall of the branch chamber, and means for retaining said valve member and said springy connection against rotation. V V

11. In mechanism of the class described, a housing having a central chamber and a plurality of branch chambers, said housing having an inlet chamber and a duet therefrom to one of said branch chambers, a valve in said branch chamber to control the air passage from said duct to said central chamher, said housing having an outlet chamber communicating with said central chamber and having an outlet port from another of said branch chambers, a valve mechanism, including a valve, in said other branch chamber, an oscillatable cam disk, said valves having stem-yokes to receive said cam disk, said disk having cam slots one for each valve, rollers located in said slots and carried by said yokes for positively opening and closing said valves alternately as said cam is oscillated, said valve mechanism comprising a removable partition member having guide ribs and a valve seat, a valve proper cooperating with said seat, a valve-stem-yoke with guide ribs operating in saidpartition member, a springy connection between'said valve proper and said yoke, means to effect an air sealing contact between said partition member and the chamber wall in which it is inserted, and means for retaining said valve member and said springy connection against rotation.

12. In a mechanism of the class described, a casing having a central chamber and a ph1- rality of branch chambers and means for passing air from ertain of the branch chambers to and through the central chamber, said certain branch chambers having valve seat passages, valves in said passages to control the same, a slotted cam in the central chamber, and yokes carried by said valves with rollers held in the slots of said cams, and pins inserted through openings in said yokes and rollers to connect the yokes with the rollers.

13. In a mechanism of the class described, a casing having a central chamber and a plurality of branch chambers and means for passing air from certain of the branch chambers to and through the central chamber, said certain branch chambers having valve seat passages, valves in said passages to control the same, a slotted cam in the central chamber, and yolres carried by said valves with rollers held in the slots of said cams, pins inserted through openings in said yokes and rollers to connect the yolres with the rollers, said casing including a cover for said central chamber with bosses to retain said pins in place.

14. In a mechanism of the class described, a housing having two distinct valve chambers with valve openings, valves for controlling said openings, an oscillatable double slotted cam disk, said'valves including stemyokes engaging said disk and having rollers mounted in the cam slots for operating said valves on alternate oscillations of said cam, one or" said cam slots having an enlarged portion to allow independent opening movement to take place in the valve operated thereby when its roller is in the enlarged portion of the slot.

15. In a mechanism of the class described, a casing having a central chamber and a plurality of branch chambers and means for passingair from certain of the branch chambers to and through the central chamber, said certain branch chambers having valve seat passages, valves in said passages to control the same, a slotted cam in the central chamber, and yokes carried by said valves with rollers held in the slots of said cam, pins inserted through openings in said yolres and rollers to connect the yokes with the rollers, one of said cam slots having an enlarged portion to allow independent opening movement to take place in the valve operated thereby when its roller is in the enlarged portion of the slot.

16. In apparatus of the class described, a valve housing having attaching lugs with bolt holes passing through the same and in communication with the interior of the housing whereby should the attaching bolts become loosened some of the contents of the housing will pass through the bolt holes for the purposes described.

1?. In apparatus of the class described, valve housing, a pair of oppositely acting valves a cam for operating said valves, and positive connections between said valves and said cam whereby said cam will move said valves to their opening and closing positions.

JEAN FRANCES -WEBB, JR. 

